Low drag surface construction
US4693201A · kind A · utility
26Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1985 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Sep 12, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T70/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A low drag surface construction utilizes a plurality of longitudinally extending, parallel, spaced apart linear vortices extending transversely of the free stream to reduce drag between the free stream and the surface. The surface is provided with stabilizing means which retains the vortices in their relationship with one another but causes them to traverse the surface in the same direction as the free stream but at approximately half the speed. The stabilizing produces a regular variation in boundary flow across the surface and may comprise dynamic means such as sequenced jets of fluid escaping from apertures in the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.